[PATCH 0/7] [un]stage: officially start moving to "staging area"

In the last 13 years of discussions virtually *everyone* has agreed that the term "the index" is not a good approximation to how most users perceive and utilize this feature. For a summary of the discssions see my blog post [1].

This is particularly true of newcomers, which is why everyone that teaches git uses the term "staging area".

Among all the proposals for a better name "staging area" is by far the one with the most consensus.

Everyone except two people agreed that "the index" is not a good term.

All non-official documentation already uses the term "staging area" [2] [3] [4], including what is considered by most people the best documentation out there: the Pro Git book.

There is absolutely no reason not to start using the term "staging area" officially.

Let's start by making the staging area a first-class citizen and making 'git stage' a prominent command, similar to 'git branch'. Additionally add 'git unstage' too.

Only *one* person expressed discontent with the term "staging area".

In favor:

* Felipe Contreras
* Scott Chacon
* Jonathan Nieder
* Matthieu Moy
* Jeff King
* Miles Bader
* Ævar Arnfjörð Bjarmason
* Jay Soffian
* Pete Harlan
* Aghiles
* Piotr Krukowiecki
* Phil Hord
* Victor Engmark
* David (bouncingcats)
* Alexey Feldgendler
* Alexei Sholik
* Zbigniew Jędrzejewski-Szmek
* Sebastien Douche
* Thiago Farina
* Mark Lodato
* Philip Oakley
* William Swanson
* Ping Yin
* Hilco Wijbenga
* Lars Vogel
* David A. Wheeler

[1] https://felipec.wordpress.com/2021/08/10/git-staging-area-rename/ [2] https://git-scm.com/book/en/v2/Git-Basics-Recording-Changes-to-the-Repository [3] https://www.atlassian.com/git/tutorials/saving-changes [4] https://coderefinery.github.io/git-intro/04-staging-area/

Felipe Contreras (7):
  stage: add proper 'stage' command
  stage: add helper to run commands
  stage: add 'add' subcommand
  stage: add 'remove' subcommand
  unstage: add 'unstage' command
  stage: add 'diff' subcommand
  stage: add 'edit' command

 Documentation/git-stage.txt            |  38 ++++++-
 Documentation/git-unstage.txt          |  25 +++++
 Makefile                               |   2 +-
 builtin.h                              |   2 +
 builtin/stage.c                        | 147 +++++++++++++++++++++++++
 contrib/completion/git-completion.bash |   5 +
 git.c                                  |   3 +-
 t/t3710-stage.sh                       |  51 +++++++++
 8 files changed, 267 insertions(+), 6 deletions(-)
 create mode 100644 Documentation/git-unstage.txt
 create mode 100644 builtin/stage.c
 create mode 100755 t/t3710-stage.sh